00283nam a2200109 a 450000500170000002000150001708200200003210000180005224500410007026000420011130000200015320251203091648.0  a0471902659  a515.88,bD, tie  aTiel, Jan Van  aConvex analysis: an introductry text  aChichesterbJohn Wiely and sonsc1984  aviii,125p, 22cm